Move all register allocator environment initialization into class Environment.

runtime/vm/intermediate_language.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 25 matching lines @@
 RECOGNIZED_LIST(DEFINE_ENUM_LIST)
 #undef DEFINE_ENUM_LIST
   };
 
   static Kind RecognizeKind(const Function& function);
   static const char* KindToCString(Kind kind);
 };
 
 
 class BitVector;
+class FlowGraphAllocator;
 class FlowGraphCompiler;
 class FlowGraphVisitor;
 class Function;
 class LocalVariable;
 
 // M is a two argument macro.  It is applied to each concrete value's
 // typename and classname.
 #define FOR_EACH_VALUE(M)                                                      \
   M(Use, UseVal)                                                               \
   M(Constant, ConstantVal)                                                     \
@@ skipping 2627 matching lines @@
         location_count_(0),
         locations_(NULL),
         fixed_parameter_count_(fixed_parameter_count) {
     values_.AddArray(values);
   }
 
   const GrowableArray<Value*>& values() const {
     return values_;
   }
 
-  void InitializeLocations() {
-    location_count_ = values_.length();
-    if (location_count_ > 0) {
-      locations_ =
-          Isolate::Current()->current_zone()->Alloc<Location>(location_count_);
-    }
-  }
+  // Initialize locations for the environment values on behalf of the
+  // register allocator.  The initial live ranges of environment uses extend
+  // from the block start position to the environment position.
+  void InitializeLocations(FlowGraphAllocator* allocator,
+                           intptr_t block_start_pos,
+                           intptr_t environment_pos);
 
   Location LocationAt(intptr_t ix) const {
     ASSERT((ix >= 0) && (ix < location_count_));
     return locations_[ix];
   }
 
   Location* LocationSlotAt(intptr_t ix) const {
     ASSERT((ix >= 0) && (ix < location_count_));
     return &locations_[ix];
   }
@@ skipping 44 matching lines @@
   const GrowableArray<BlockEntryInstr*>& block_order_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_